Here are the completed sentences:

1. Many people have no **belief** in ghosts. (BELIEVE)
2. Tina had no **suspicion** that anything was wrong. (SUSPECT)
3. We measured the **length** of the room with a ruler. (LONG)
4. Our teacher was really **angry** when she found out what we were doing. (ANGER)
5. George won a medal for **bravery**. (BRAVE)
6. Looking in the mirror too much is an example of **vanity**. (VAIN)
7. Do you think you have the **ability** to pass the test? (ABLE)